Reaming tool



June 9, 1925.

W. L. OBRIEN REAMING TOOL Filed Sept. 15, 1922 m @www m7 attorney;

Patented June 9, 1925i.

UNITE STATES VJILLIAM L. OBRIEN, OF DAYTON, OHIO.

REAMING TOOL.

Application filed September 15, 1922.

To all 'whom zi/may concern.'

Be it known that T, WILLIAM L. OBRIEN, a citizen of theA United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Reaming Tools, of which the following is a specification, reference being had therein to the accompanying drawing. 1

My invention relates to a tool and in-particular to a reaming tool and a holder therefor.

It is my object to provide a floating tool holder for a reaming tool in which the holder` is held stationary and the work turns relatively to the reamer.

It is my object to provide an universal adjustment of the tool holder and its supporting casing which will permit of the free movement of the tool holder but which will prevent the twisting of the tool holder due to the torque imparted thereto.

vIt is a further object to provide a con stant automatic adjustment of the reaming tool and its holder to the work to take upV any inequality of the position of the holder relative.v to the work so that the hole in the work will be reamed accurately.

It is a further object to provide means of limiting the degree to which this automatic adjustment will take place.

It is a further object to provide means of quickly clamping in position and securing a hold on the reaming tool.

Referring to the drawings.

Fig. 1 is a side elevation of the complete tool partially in section;

Fig. 2 is a front elevation of the assembled tool and holder;

Fig. 3 is a detail partially in section of t-he universal joint between the supporting casing and the tool holder;

Fig. 1.- is a side elevation in detailof the torque pin used in the universal joint .between the tool holder and the supporting casing;

Fig. 5 is an end elevation of the universal connection of the tool holder and casing.

Referring to the drawings in detail, 1 is a cylindrical casing having chamber 2 therein. At one end it is provided with the narrow throat 3. This throat has communicated with it through the walls the passageway 4 into which projects the posi Serial No. 588,421.

tioning pin 5 which tits freely therein. This pin is carried by the ball head 6 of the tool holder 7. This head 6 is provided with a rounded end 8 and fits within the restricted passageway 3. The tool holder 7 is of greater diameter than the head 6, and fits within the chamber 2 which permits of clearance between 7 and 1.

The left hand end of 1 is provided with a chamber '9 in which lits the tool holder head 10.

7 is provided with a chamber 11, for the reception ofthe shank of thereaming tool. This arrangement is shown where a part of the wall of 7 is broken away. The head 10 has a similar chamber for the reception of the supporting end of the reaming tool, this chamber being designated as 12. In the arrangement of the reaming tool 13 shown in Figs. 1 and 2 the supporting shaft of the .tool only extends into 12, but other types of tools with different sizes of shafts maflhave their supporting shafts projected to The head 10 is provided with a collar 14- split at 15. The split collar is adapted to have its halves drawn together by the bolt 16 so that the supporting shaft of the reaming tool 13', such as shaft 17, may be located in posi-tion relative to the tool holder.

There is provided a yieldingly adjustable member to keep the Heating tool holder 7 automatically in a position where the reamer '1.3 will follow the proper course through the work and ream in a loatingengagement therewith.

'lhis arrangement consists of azcontact button 18 which has a limiting head 19. 1S engages with the head 10 tomove the tool holder while 19 limits its movement u' by coming in contact with the shoulder 2() in the spring chamber 21. This springr chamber is located in a flange 22 Carried at the left hand end of 1. Within this chamber and engaging with the head 19 is a spring 23, the tension on which may he adjusted by the screw plug 24.

As the tool holder moves about the universal joint at its right hand side, it is retained in a predetermined position yieldingly by 18, 19 and 23.

Returning to the universal joint which forms the connection between 1 and 7 there is provided aperture for the pin 2G oarried by the torque pin 27 which is flat and through which passes the pin ri t angles through the aperture 28. This pin 2'? has a head 29 which is rotatably mounted in the aperture 30 in l. The fiat portion of 27 tits in a slot 8l in G and thus prevents C rotating about the major axis ot the sembly to resist the ltorque action imparted to the roaming tool, hut this does not prevent the lateral or vertical movement within a. limited legree of the tool holoer 7 and iis head 6 relative to i, thus permitting of an etlicient operation ot the toinatie means for 1naintainingl the alignment of the reamer and its floating engagement Vith the Work upon which it is operating.

While I have shown and described eertain features as constitutin?r my invention, it. will be understood that parts have been shown for purposes of illustration only, and that I do not desire to he limited to such details, as obvious modifications will occur to a'person skilled .in the art.

Having thus fully described my invention,

what I claim as new and desire to secure by Letters Patent, iszt In a floating tool holder, a tubular casing` provided at one end with pairs of iutersecting apertures, the axes of which intersect the bore of the casing, a tool holder arranged in the easing and having a ball head at one end provided with a kerf dividing the head into two tines; said tines being provided with aligned apertures c0- axiai with the axes of one pair of the apertures in the casing, a. pivot pin rotatably mounted in the other pair 0f apertures in the easing` and having a Hat central p0rtion snugly and slidably engaging the side surface of said korf, and a second pivot pin passing through one pair of apertures in the casing, through the apertures in the tines and through the lirst mentioned pivot pin, and functioning to look the tool holder and first mentioned pivot pin in the oasing.

In testimony whereof, I affix my signature.

WILLIAM L. OBRIEN. 

